Just thought I'd throw this out there for those that might be looking for mapping apps for the phone...
I went looking for one, with the sugar bush in mind and ran across this one that's designed for hunters and hunt groups.. (which I am, also)
Seems pretty cool so far... Can do all your GPS mapping or tracing and marking in the bush, and then instantly sync it to the website.. for viewing and editing on your PC at home, etc..

http://www.huntstand.com